What is Alpha-Linolenic Acid (ALA)?

Alpha-Linolenic Acid (ALA) is an essential omega-3 fatty acid found mainly in plant foods. Because the body cannot make it, it must come from the diet.

What foods are high in ALA?

Common ALA-rich foods include flaxseeds and flaxseed oil, chia seeds, walnuts, and canola or soybean oil. ALA content varies by food and processing.

Does ALA convert to EPA and DHA?

ALA can be converted in the body to EPA and DHA, but the conversion is limited and varies between individuals. Getting EPA/DHA directly from marine sources or algae may be considered when higher levels are needed.

How much ALA should I take per day?

Typical daily intake targets are often around 1.1–3 g per day, depending on diet and individual needs. It is commonly obtained through foods rather than supplements.

What are the potential benefits of ALA?

ALA supports overall omega-3 status and is associated with cardiovascular and anti-inflammatory health. It also contributes to normal cell membrane structure, including in the brain.

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Alpha-
Linolenic Acid

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Essential plant-based omega-3 fatty acid supporting heart, brain, and anti-inflammatory health.

Anti-inflammatory Cardiovascular Support Cognitive Enhancement Essential Nutrient

dose range

1.1–3 g

Taken with meals, usually split between first and second meal of the day.

Consumption

Take with food containing some fat to enhance absorption.

Fat-soluble: take with fat.

Best time

Split doses across meals for better tolerance and absorption.

Description

Alpha-Linolenic Acid (ALA) is an essential omega-3 fatty acid primarily found in plant sources like flaxseeds, chia seeds, and walnuts. It is vital for human health, serving as a precursor to longer-chain omega-3s (EPA/DHA).

benefits

Main effects with level of evidence

Moderate

Note on evidence

ALA is essential and supports cardiovascular and anti-inflammatory health, but conversion to EPA/DHA is limited; evidence is strongest for heart health, with suggestive but less robust support for cognitive function.

Cardiovascular Support

Strong

ALA intake is associated with improved lipid profiles, lower blood pressure, and a reduced risk of coronary heart disease.

Particularly relevant for: adults · vegetarians · vegans

S1 · NIH Office of Dietary Supplements – Omega-3 Fatty Acids Fact Sheet S2 · PubMed: Dietary Alpha-linolenic Acid and Risk of Fatal Ischaemic Heart Disease

Anti-inflammatory Effects

Moderate

ALA may reduce markers of inflammation and help modulate inflammatory pathways, potentially benefiting chronic inflammatory conditions.

Particularly relevant for: adults · individuals with chronic inflammation

S1 · NIH Office of Dietary Supplements – Omega-3 Fatty Acids Fact Sheet S3 · PubMed: Effects of Alpha-linolenic Acid Supplementation on C-reactive Protein

Cognitive Support

Limited

ALA contributes to neuronal membrane health and may help maintain cognitive function, with some evidence suggesting protection against cognitive decline.

Particularly relevant for: older adults

S1 · NIH Office of Dietary Supplements – Omega-3 Fatty Acids Fact Sheet S4 · PubMed: Dietary Omega-3 Fatty Acids and Cognitive Function

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

ALA is generally safe at recommended doses, but high intakes may increase bleeding risk and cause gastrointestinal discomfort.

warning notices

High doses may increase risk of bleeding, especially with anticoagulants or antiplatelet medications.
Doses above 3 grams per day may cause diarrhea or loose stools.
Those with prostate cancer or at high risk should use caution with high doses.
Avoid use above 3 grams per day unless advised by a healthcare provider due to possible gastrointestinal side effects and increased bleeding risk.
Use with clinician supervision if taking anticoagulant or antiplatelet medications due to risk of bleeding.
Individuals with a history of prostate cancer should consult a healthcare provider before supplementing with high doses.

Known interactions with medications